Commit 4e192ee6 authored by Alexander Aring's avatar Alexander Aring Committed by David Teigland
Browse files

fs: dlm: disallow buffer size below default 



I observed that the upper layer will not send messages above this value.
As conclusion the application receive buffer should not below that
value, otherwise we are not capable to deliver the dlm message to the
upper layer. This patch forbids to set the receive buffer below the
maximum possible dlm message size.

Signed-off-by: default avatarAlexander Aring <aahringo@redhat.com>
Signed-off-by: default avatarDavid Teigland <teigland@redhat.com>
parent e1a0ec30

fs/dlm/config.c

+7 −2
Original line number Diff line number Diff line
@@ -166,8 +166,14 @@ static bool dlm_check_zero(unsigned int x) 
	return !x;

}



#define DEFAULT_BUFFER_SIZE     4096

static bool dlm_check_buffer_size(unsigned int x)

{

	return (x < DEFAULT_BUFFER_SIZE);

}



CLUSTER_ATTR(tcp_port, dlm_check_zero);

CLUSTER_ATTR(buffer_size, dlm_check_zero);

CLUSTER_ATTR(buffer_size, dlm_check_buffer_size);

CLUSTER_ATTR(rsbtbl_size, dlm_check_zero);

CLUSTER_ATTR(recover_timer, dlm_check_zero);

CLUSTER_ATTR(toss_secs, dlm_check_zero);
@@ -901,7 +907,6 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num) 


/* Config file defaults */

#define DEFAULT_TCP_PORT       21064

#define DEFAULT_BUFFER_SIZE     4096

#define DEFAULT_RSBTBL_SIZE     1024

#define DEFAULT_RECOVER_TIMER      5

#define DEFAULT_TOSS_SECS         10